Color

#645d44

#645d44
hex#645d44
rgbrgb(100, 93, 68)
hslhsl(47, 19%, 33%)
oklchoklch(0.478 0.039 94.3)
Closest name: Cypress (#585d40)Relative luminance 0.1096

Colors that go with #645d44

Charcoal, Slate Blue and Champagne lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#444b64

#644d44 · #5b6444

#44645d · #5d4464

Split-complementary

Open in tool →

#445b64 · #4d4464

#44644d · #444b64 · #64445b

Contrast

#645d44 as textRatioAAAA largeAAAFix
Aaon white
6.58:1passpassfail
  • AAA: use #5e5840 as the text (7.13:1)
Aaon black
3.19:1failpassfail
  • AA: use #7f7757 as the text (4.68:1)
  • AAA: use #a09673 as the text (7.1:1)
  • AA: or shift the background to #d6d6d6 (4.53:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #645d44 as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#645d44 reads as warm, muted, editorial. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #645d44
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #645d44 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/645d44-c4c09c-62abcb-2a2d1f-f1ece9?lock=0&style=vibrant

Want the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.

Machine-readable: color.md